“It's sort of like getting a job testing various sex lubrication formulas, only to realize that the goal is finding out which ones make your dick break out in an angry rash. The entire point of play testing is to find the parts of the game that are horrible, frustrating and broken, and play them over and over and over and over.
The life of a games tester is ruled by strict guidelines from the developers which condemns you to playing the same small section of the same game for your entire eight hour shift. Each time you hit a glitche, you write up a small treatise describing exactly how you found it. They'll try to fix it, you'll go back the same spot and play it over and over again to make sure. This goes on for weeks.”
http://www.cracked.com/article_17066_6-dream-jobs-that-would-actually-suck.html